Measurement of Pulmonary Flow Velocity: a Comparison of Doppler Ultrasound and MRI
- VernacularTitle:肺动脉流速的MRI测量与多普勒超声比较研究
- Author:
Xiaoyan LEI
;
Yamei SHEN
;
Youmin GUO
;
Min CHEN
;
Jian YANG
;
Guiping XU
- Publication Type:Journal Article
- Keywords:
pulmonary artery;
blood flow velocity;
MRI;
doppler
- From:
Journal of Practical Radiology
2001;0(01):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the accuracy and applied value of measurement of pulmonary flow velocity with phase-contrast MRI(PC-MRI).Methods ①42 healthy volunteers were divided into 2 groups randomly,one group was examined by PC-MRI,another was examined by doppler ultrasound.The inner diameter,maximum velocity and mean velocity of main pulmonary artery(MPA) were measured;②The flow volume of MPA in a cardiac cycle was calculated with formulation.Results ①The inner diameters of MPA measured with PC-MRI and doppler ultrasound were(24.4?3.41) mm and(21.5?2.55) mm respectively;②The maximum velocity and mean velocity of MPA measured by PC MRI were(79.9?24.0) cm/s and(50.3?7.71) cm/s respectively;③The maximum velocity and mean velocity of MPA gained by doppler ultrasound was(88.8?8.33) cm/s and(53.7? 5.04) cm/s resepectively;④The flow volume of MPA in a cardiac cycle measured by PC MRI and doppler ultrasound was(73.5?6.60) ml and(69.0?10.6) ml respectively.The results were analyzed by group sample t-test,and the level of test was 0.05.Conclusion The blood flow velocity and volume of pulmonary artery can be measured accurately by PC-MRI,it is of certain applied value in assessing the pulmonary blood flow dynamics changes.
